Most agents aren't interested in previously published works, because most publishers aren't. If your sales were in the many tens of thousands, you've got a better shot, but that can work against you too, as some can think that means it's played out. Lower, and you did a bunch of publicity, is not promising.

This is non-fic, which means your credentials and platform are important in your proposal. So... unlikely but not entirely impossible, but you'd be better off just focusing on the next book, imo.